$ git clone -n https://src.fedoraproject.org/rpms/ghc-wizards.git /var/lib/mock/f40-build-2103452-50555/root/chroot_tmpdir/scmroot/ghc-wizards
Cloning into '/var/lib/mock/f40-build-2103452-50555/root/chroot_tmpdir/scmroot/ghc-wizards'...
$ git fetch origin 7ed72b0a6f986a7aa9b8e3fd272d7dfa56821f95:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-wizards
 * [new ref]         7ed72b0a6f986a7aa9b8e3fd272d7dfa56821f95 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ed72b0 revised .cabal file